I don't know much about it but would guess that algorithmic trading could wipe out the entire market in a few minutes.

It's not that what you say is wrong, it simply a matter of perspective.

Walter E. Williams, professor of economics at GMU, stated "Government income redistribution programs produce the same result as theft. In fact, that's what a thief does; he redistributes income. The difference between government and thievery is mostly a matter of legality